PROPORTIONALITY CONSTANT R 'Molar Gas Constant'or 'Universal Gas Constant' The value of R depends on the units we use for P and V.The units of Tare always Kelvin(K)and 'n'is always the number of moles of material. R=8.314JK1mo1 when P in Pascals(Pa)and V in cubic metres(m3). (SI units) R=0.0821 Latm K-1 mol-1 when P in atmospheres(atm)and Vin litres (L). Can also use R=8.314 when Pin kPa and Vin litres which are mixed units but it works because Pa m3 (Px10)x(Vx10-3)the10-3and103 (kPa) () cancel each other out PDF文件使用"pdfFactory Pro”试用版本创建鳍m,fineprint.com,cn8 The value of R depends on the units we use for P and V. The units of T are always Kelvin (K) and ‘n’ is always the number of moles of material. R = 8.314 JK-1 mol-1 when P in Pascals (Pa) and V in cubic metres (m3 ). (SI units) R = 0.0821 Latm K-1 mol-1 when P in atmospheres (atm) and V in litres (L). Can also use R = 8.314 when P in kPa and V in litres which are mixed units but it works because Pa m3 (P x 103 ) x (V x 10-3) the 10-3 and 103 (kPa) (L) cancel each other out PROPORTIONALITY CONSTANT R ‘Molar Gas Constant’ or ‘Universal Gas Constant’ PDF 文件使用 "pdfFactory Pro" 试用版本创建 嘀www.fineprint.com.cn